Inman, who runs the über-popular website The Oatmeal, is being sued by Oatmeal Studios, a Massachusetts-based greeting card company that says Inman's use of The Oatmeal is too similar, and will likely confuse customers who believe the two businesses are related.

Inman recently teamed up with fellow greeting card company Papyrus to release a series of paper greeting cards on his online store. Oatmeal Studios, in business for the past 35 years, says those cards are at the center of the confusion.

The company filed a complaint against the Oatmeal and Papyrus’ parent company, Recycled Studios, with Boston's federal court Wednesday morning. According to Ars Technica, which first reported the suit, Oatmeal Studios' claim includes no specific damage demands.

This is not the first time this year that Inman has been sued or summoned into court for the sake of rights ownership. This summer, infamous humor website FunnyJunk sued Inman for defamation of character after the popular webcomic artist posted statements on his site alleging that his comics were "being stolen, re-hosted, and monetized on FunnyJunk's website."